InfoPath Dev

Hello,

 I have made an InfoPath form based on a list of my SharePoint site. I would like to add a repeating section with a lookup value from another table. When I go to the section properties, I want to enable users to insert new sections. Unfortunately, this option is disabled (as you can see in the image).

http://imageshack.us/photo/my-images/411/capturekzg.png/

 Is there any way to enable this without making a new InfoPath form?

 Thanks in advance.

I think that InfoPath creates the XSN form template it locks the schema to make sure that it stays in sync with the SharePoint list it's based on.

So in theory you would make changes to your list first, then the form would get "refreshed" (sorry, I'm not sure of the correct term) to match the updates made to the list.

What are you trying to accomplish? Submitting to a SharePoint list? Maybe there's a different way, without using one of these forms with a locked schema.